baseband-devel December 2012

baseband-devel@lists.osmocom.org

27 participants
51 discussions

is the Viterbi decode for the AFS provided by Sylvain right?
by bob 23 Feb '13

23 Feb '13

Hi ,List: search some materials, find that the decode method of AFS convolutional code is different from the EFS`, it use RSC, and need SOVA(soft output viterbi algorithm). am i right? -- View this message in context: http://baseband-devel.722152.n3.nabble.com/is-the-Viterbi-decode-for-the-AF… Sent from the baseband-devel mailing list archive at Nabble.com.

4 7

sylvains talk from 29c3
by Vic Delorge 12 Jan '13

12 Jan '13

Speaker: Sylvain Munaut or how to turn a phone into a BTS The calypso baseband and its companion chips are used on the Motorola C123 among other and are now well known for being supported by the Osmocom-BB open source GSM baseband implementation. A couple years ago, it was hacked a little further by using it as a raw bits capture device allowing the interception of GSM traffic very cheaply. This talk will present some further work on that platform, showing that just because a device wasn't design for a given task doesn't mean it can't do it. More specifically how you can hack this phone to act as a GSM basestation and broadcast your own network. http://youtu.be/xFjVcxMpA6c

3 3

OsmoDevCon 2013 brainstorming
by Harald Welte 04 Jan '13

04 Jan '13

Hi all, as the year 2012 has already ended or will soon end depending on your timezone, it might be a good occasion to start thinking of an OsmoDevCon 2013. I personally percevied OsmoDevCon 2012 as a big success, and it was fun to bring everyone together. Generally, I prefer to keep the spirit of an invitation-only developer+contributor-only event of those involved in Osmocom. At the same time, I would consider it a good idea to add a one day user-conference to the schedule, where we try to get interested users up to speed with the various projects, possibly including some workshops and the like. So schedule-wise, I would suggest something like: * one day user conference * two day developer/contributor event * optionally: 1-2 "hacking days". The concept of "hacking days" has proven to be quite useful for the netfilter project in the past (Pablo and I can acknowledge to that fact). I'm not sure how many people would be able to spend even more days of their schedule, but even if it's a much smaller group it would still be useful, IMHO. I'd like you to 1) provide feedback on the ideas about the one-day user event and the hacking days 2) consider whether late march (like 2012) would be a good schedule again 3) what we can improve from the last event In terms of improvements, I so far have noted down: * larger venue needs to be found * complaints about the venue not having sufficient heating Venue-wise, I would again suggest to hold it in Berlin, as it's reasonbly well connected, has lots of low-cost flights to it, accomodation is not too expensive and holger/me/sysmocom can take care of local organization related activities. Hoewver, if somebody has a strong opinion against berlin _and_ is willing to organize it, I'm not completely against another venue. Regards and happy new year, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

4 7

29c3 youtube video
by Vic Delorge 02 Jan '13

02 Jan '13

this is the 29c3 talk about GSM DOS and SMS sniffing . awesome work osmocom team. layer 1,2,3 now runs all on the phone :) http://youtu.be/a1iZV2nl28A

6 10

Filter replacement
by Clemens Gruber 01 Jan '13

01 Jan '13

Hi, yesterday I fucked up the second C123 while trying to replace the filters, so I decided to buy one model from Sysmocom (with the filters already replaced), but due to too many orders they do not offer this service anymore. Is somebody on this list able and willing to sell me one C123 with the filter kit already built in (and tested)? I'd really appreciate if someone, who is more experienced in SMD soldering than me, could help me out. If so, please contact me at: clemensgru(a)gmail.com I live in Austria, so delivery from Europe should not be a problem. Thanks. Clemens

2 1

Filter replacement
by Clemens Gruber 31 Dec '12

31 Dec '12

1 0

Need guidance for LNA and PA
by Akib Sayyed 31 Dec '12

31 Dec '12

Dear List I wanted to buy LNA and PA for my phone what specification should i use for purpose increasing signalling strength. please guide me thanks -- Akib Sayyed Matrix-Shell akibsayyed(a)gmail.com akibsayyed(a)matrixshell.com Mob:- +91-966-514-2243

1 0

Question on saving burst information
by Bhaskar11 30 Dec '12

30 Dec '12

In ccch_scan the burst information is first saved to file, then local_burst_decode is applied before sending to GSMTAP. Would it not be more useful to save burst data after local_burst_decode? Is there some utility in storing it in its raw form? Looks like I am missing something? B.

2 2

kraken for uplink bursts
by g.roelant＠telenet.be 30 Dec '12

30 Dec '12

Hi, Is there a kraken version vailable for uplink? what do i need to change on the source code in order to find the kc for uplink bursts? thanks ps. all downlink frames seem to have random padding here...

1 0

Osmocom-BTS
by Akib Sayyed 30 Dec '12

30 Dec '12

Congrats Sylvain for such great engineering work.its really a good and cheap solution who want to learn about GSM. there are certain questions didnt get chance to be asked in conference. here are some 1.is it possible in future to implement one phone and atleast 4 timeslot cell? means 3 voice and 1 BCCH. 2. what about encryption? is it possible to implement encryption ? 3.also how can be solve relying on commercial cell? 4.the code which will be released will contain single slot operation or multi slot with voice (after work and developement) Thankx and again congrats :) cheers -- Akib Sayyed Matrix-Shell akibsayyed(a)gmail.com akibsayyed(a)matrixshell.com Mob:- +91-966-514-2243

2 2

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

baseband-devel December 2012